Should I wait for the oscillation to stabilize setting of MCC?

Question:

When changing the system clock from the subsystem clock to the main system clock, how many clocks should I wait for the oscillation to stabilize after setting MCC to oscillation enabled?

Answer:

You do not need to wait at all.
When operating on the subsystem clock, the main system clock using RC oscillation will stabilize by the time the clock switches after oscillation is enabled by clearing the MCC bit.
Therefore, there is no particular need to program an oscillation stabilization wait time; you can switch the clock immediately after enabling oscillation.